Ornellas, d'Ornellas or D'Ornellas are surnames of Portuguese origin. Notable people with these surnames include:
Ornellas José Ornellas (1921–2025), Brazilian politician Marcus Ornellas (born 1982), Brazilian actor
d'Ornellas Charlotte d'Ornellas (born 1986), French journalist and columnist Colin d'Ornellas (1889–1934), a cricketer from British Guiana Pierre d'Ornellas (born 1953), French Roman Catholic archbishop
D'Ornellas Manuel D'Ornellas (1937–1999), Peruvian lawyer and journalist
See also Ornella, an Italian feminine given name